Ventilator



,imrrs EZEKIEL VAN .N'OORDEN, OF BROOKLINE,

CIATION.

MASSACHUSETTS, ASSIGNOR TO E. VAN I VE'NTILATOR.

To all whom it may concern:

Be it known that I, Eznimn. VAN Noon- DEN, of Brookline, in the county of Norfolk and State of Massachusetts, a citizen of the United States, have invented a new and useful Improvement in Ventilators, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings,forming a part of this specification, in explaining its nature.

The present invention relates to that type of ventilator having a rotary cowl or hood and especially to that type in which the opening or passage into and through the head is controlled by a damper having attached to it a flexible connection for operatin the damper.

The object of' my invention is to so mount the head as to ensure freedom of rotation, in which connection it is my especial object to provide means whereby the pressure exerted by the weight of the head may be. distributed evenly throughout the bearing on which the head rotates, and to eliminate torsional strain upon this bearing. It is my further object, also,'to make the ventilator as simple and inexpensive as'possible in construction coupled, however, wlth eificiency.

A ventilator embodying my invention can best be seen and understood by reference to the drawings, in which Figure 1 shows the ventilator mainly in cross vertical section, a few of the interior parts being shown in side elevation.

Fig. 2 is a view partly in plan and partly in section of a portion of the interior structure assisting in the support of the rotary head of the ventilator. I

Fig. 3 is a side elevation of the same interior head-supporting structure, and

Fig. 4 is a vertical section of the parts shown in Fig. 8. I I

Referring to the drawings 1 represents the body of the ventilator or lower member, as it will afterward be referred to. This is generally cylindrical in form and is attachable to any suitable base of support. I

Zrepresents the rotary head of the ventilator or rotatable upper member, as it will afterward be referred to. This is fitted with the usual vane or wing 3 by which it is rotat'ed. The upper member is generally cylindrical in form and provided with an ofi'set on which the vane is mounted. It has, also, in

Specification of Letters Patent.

the side thereof an outlet controlled by a damper 4 which is controlled by a connection 5 that passes upward and around .PatentedMay .9, 1922,. Application filed May 6, 1920. Serial Nu 379,262

pulleys 6 arranged within a closed channel 71 formed upon the top side of the member;

will be later referred to.

The upper rotatable member fits over the lower member and is mounted to rotate in relation to it as follows 2- l Centrally located within the ventilator is a hollow upright or post 8.

upper rotatable member and occupies a position within the axis on which the upper member rotates. The post acts as the main support for the upper rotatable member, which is attached tothe top end of the post, a suit able hollow cleat 9 being employed for making the connection. The upper member is otherwise firmly secured to the post by a fixture or brace 10 consisting of arms 11 bolted or otherwise secured to the wall of the member and extending inwardly in a radial direction to connect with a spider 12 which firmly embraces the post at a point some distance removed from the top end of the post Where the initial attachment is made. In fact, this second fixture is preferably arranged to embrace the post at a point as near as possible the bottom of the upper member in order to obtain stability of structure between the upper member and the post.

From the upper rotatable member the post extends downwell into the lower member or even through it if desired. The post tofurther disposition of the connection 5 This post is vertically arranged to extend through the gether with the rotary head carried by it is supported in the following manner: Bolted or otherwise secured to the wall of the lower member are crossarms 14, 15, respectively, These arms arearranged in separate planes, one above the other, and their point of intersection is slightly offset from the axial centre of the rotary member or that occupied by the post 8. Attached to the arms 14, 15 adjacent I the point of their intersection, so as to lie centrally disposed, is a fixed plate or bearing 16 having downturned flanges 17 bywhich it is secured to the respective arms. The post 8 extends through the bearing 16 andturns therein, the inside face of the plate-around the opening in it being preferably fitted with a suitable linin 18 providing a replaceable wearing part. oosely arranged upon" the post above the bearing 16 is a collar 19. This collar is secured to the post by a crosspin 20 which provides a bearing upon which the post turn or adjust itself upon a horizontal axis relatively to the collar. Arranged upon the post between the collar 19 and the plate or fixed bearing 16 is an antifriction device 21. This device is one of well known character consisting of spaced annular disks or plates 22, 23 and an intermediate ball-bearing plate 24, and the collar rests upon the top surface of the plate 22 only by a horizontal straight edge 25, the under side of the collar being beveled to provide this edge. The edge 25 extends in a direction at right angles to the pin 20 and provides a bearing upon which the collar may turn or adjust itself relatively to the anti-friction bearing.

With the parts thus arranged the post 8 and entire upper rotary structure borne by it will through the intermediary of the collar and anti-friction device, be supported by the fixed plate or bearing 16. Owing to the fact that the post may turn upon an axis relatiyely to the collar and through the collar upon another axis relatively to the anti-friction hearing, it accordingly follows that the post and rotary structure carried by it will bear evenly upon the anti-friction bearing whatever the relative disposition of the post and bearing may be, thereby ensuring freedom of rotation and even wear upon the bearing without torsional strain. It enables, also, the parts to be manufactured without the mechanical nicety otherwise necessary which from the standpoint of expense in making the ventilator is of vital importance. For the purpose of ensuring further sta bility the post 8 is further reinforced from the lower structure by a brace or fixture 27. This brace or fixture comprises a series of arms .48 secured by bolting or otherwise to the interior wall of the lower member and extending inwardly to connect with a spider 29 which snugly embraces the post though enabling the post to rotate within it. The brace or fixture 27 is as widely separated as possible from the bearing or anti-friction device on which the upper member and post rotate, the preferred structure being that in which the fixture is arranged near the top of the lower member and the anti-friction device and bearing well down within the same or approaching the bottom of the lower member. In fact, with the parts thus arranged the upper structure will not only rotate with great freedom, but all lateral strain causing friction will come upon the parts hearing such strain and not upon the operating parts of the anti-friction device. For the purpose of holding the post and the rotary structure carried by it from endwise displacement with relation to the bearing on which it rotates, or, in other words,

to prevent its being lifted off the bearing, there is attached to the post just below the spider 29 a collar or stop 30.

In addition to the functions above ascribed to it, the post 8 acts as a conduit through which the flexible connection 5 for operating the damper may be extended and be free from engagement with any of the operating parts during the turning of the upper rotatable structure.

Having thus fully described my invention, I claim and desire to secure by Letters Patent of the United States 1. In a ventilator, having a lower member,

an upper rotatable member, a post centrally arranged for supporting the upper member, means for fixing said post to one of said members, a bearing for said post fixed to the other of said members, the combination therewith of means whereby the post may be supported to turn from off said bearing and adjust itself on separate axes with re-,

lation thereto.

2. In a ventilator, having a lower member, an upper rotatable member, a post centrally arranged for supporting the upper member, means for fixing said post to one of said members, a bearing for said post fixed to the other of said members, an antifriction device carried by said bearing, the combination therewith of means whereby said post may be supported by said bearing to turn on said anti-friction device and be self-adjustable on different axes with relation thereto and to said bearing.

3. In a ventilator, having a lower member, an upper rotatable member, a post centrally arranged for supporting the upper member, means for fixing said post to one of said members, a bearing for said post fixed to the other of said members, an antiw friction device carried by said bearing, the combination therewith of a collar loosely arranged upon the post beyond said antifriction device, and means for fixing the collar to the post whereby the post may turn upon an axis relatively to the collar, said collar being provided with an edge by which it has bearing against said anti-friction device and thereby may turn thereon on an axis substantially at right angles to the firstnamed axis.

4. In a ventilator, having a lower memher, an upper rotatable member, a post centrally arranged for supporting the up per member, means for fixing said post to one of said members, the combination therewith of crossed bars fixed to the other of said members and arranged whereby the point of their intersection may be offset from the line of said post, a bearing fixed to said bars through which the post extends, and means whereby the post may be supported from off said bearing and turn on different axes with relation thereto.

comprising a fixed bearing through Which 10 the post extends, an anti-friction device-carried by said bearing, the combination therewith of mechanism whereby the post may turn on separate axes on and in relation to said bearing and anti-friction device car- 15 ried by it.

EZEKIEL VANNOORDEN. 

